US20210386425A1 - Gastrointestinal tissue approximation clip (gi tac) system - Google Patents

Abstract

A gastrointestinal tissue approximation clip (“GI TAC”) system for approximating tissue defects, the GI TAC system including an applicator that is sized to travel through an instrument channel of an endoscope; a plurality of tissue approximation clips that are transported to a plurality of locations about a tissue defect by the applicator; a suture coupled to at least one of the tissue approximation clips; and a clip approximation means for approximating the tissue approximation clips. The clip approximation means and the tissue approximation clips are sized respectively to travel through the instrument channel, and the tissue approximation clips are adapted to be detachably coupled to the applicator.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a continuation-in-part of and claims priority to U.S. patent application Ser. No. 17/148,455 that was filed on Jan. 13, 2021, which claims priority to U.S. provisional patent application No. 62/960,619 that was filed on Jan. 13, 2020, the disclosures of which are incorporated herein by reference in their entirety.
FIELD OF THE INVENTION
• The present invention relates to gastrointestinal tissue approximation clip system, and more particularly, a gastrointestinal tissue approximation clip system and a method for closing large defects as found in certain indications in gastroenterology.
• The field of gastroenterology is expanding rapidly due to the practice broadening its scope. One of the areas in gastroenterology that has been rapidly developing is endoscopic resection of different gastrointestinal (GI) abnormalities including (but not limited to) polyps, early cancer, and other lesions (abnormal growths) associated with GI indications.
• A few different resection techniques have been developed so far, which include (but are not limited to) endoscopy mucosal resection (EMR), endoscopic submucosal dissection (ESD), endoscopic full-thickness resection (EFTR), and submucosal tunneling endoscopic resection (STER). However, the above techniques may be fraught with a few complications. Two of the most common are bleeding and perforation of the tissue. For either complication, a well-trained gastroenterologist would initially attempt a closure of the defect with endoscopic clip(s) (essentially bringing tissue edges in close apposition that is akin to suturing), or clipping of the blood vessel(s). There are also combined GI-surgery procedures such as Natural Orifice Transluminal Endoscopic Surgery (NOTES) where an opening on the gastrointestinal wall is intentionally created to go beyond the GI tract and perform surgery on structures such as the gallbladder. The opening itself has to be closed off at the end of this procedure.
• However, there are several drawbacks to the endoscopic clips and devices known in the art, some of which will be discussed although they do not represent an exhaustive list of all of the clips and devices known in the art. Traditionalendoscopic clips10, as shown inFIG. 1, are rather limited in their application with regards to closing large perforations/defects because approximating the edges of such large defects can be extremely difficult, if not impossible, due to the limitation of the small diameters of their jaws (as shown in thejaw15 ofFIG. 1). Other clips were devised to close such large defects; one such clip is a larger variation that is attached on tip of the endoscope, i.e. over-the-scope clip. However, due to the large size of these clips, the gastroenterologist would have to take the endoscope out of the patient and spend time to place the larger clip on the tip of the endoscope and then re-introduce the endoscope with the larger clip attached thereon back into the patient. Such large clips traditionally required a therapeutic endoscope that is thicker in diameter to other endoscopes to accommodate the larger clip size. Furthermore, a device placed over the endoscope can increase the bulk of the endoscope when re-introducing the endoscope and the clip into the patient thus making the procedure more difficult, time consuming, and potentially risky. In addition, use of a shorter endoscope, referred to as either an “upper endoscope” or “gastroscope,” is required for these large clips; this is limiting due to the upper endoscope's shorter length than traditional endoscopes, which in turn means that the upper endoscope can be introduced into the patient only to a certain distance resulting in some locations, e.g. proximal colon, likely being outside of its range.
• Another device has been developed to emulate surgical suturing to close a defect tightly. However, the gastroenterologist would still be required to take the endoscope out of the patient to place this suturing device on the tip of the endoscope and re-introduce into the patient the endoscope with the suturing device attached thereon. Additionally, this suturing device requires a therapeutic endoscope with all of its attendant drawbacks as described above along with the upper endoscope. Thus, this suturing device requires placement over the endoscope, which in turn increases the bulk of the endoscope when re-introducing the endoscope and the suturing device into the patient for closure of the defect. The therapeutic endoscope for the suturing device only comes in a shorter scope length, which further limits the distance that this device can reach, meaning locations such as the proximal colon and much of the small intestine are likely to be inaccessible with the suturing device. Additionally, this device operates quite differently from traditional clips or large clips. Thus, the usage of this device requires training sessions, repeat training session(s) if not used often and the gastroenterologist needs to be reminded of how the suturing device operates, and more effort overall than other devices.
• Alternatives to the above listed devices include emergent surgery, interventional radiology (IR) procedure for uncontrollable bleeding, observation with antibiotics and nil per os (NPO) status to see if the defect would close on its own. However, these procedures are either highly invasive or require longer observation periods, and thus, longer and costlier hospital stays. If these devices fail, much time will be required before alternatives such as surgery can be performed; thus, there will be increased risk for the patient, including death, through evolution into a clinical scenario such as pneumoperitonuem, pneumothorax, tension pneumothorax, etc.
• Accordingly, in view of the problems described above, there exists a need for a tissue approximation system that allows the physician to close large GI defects quickly and efficiently, provides cost-savings, decrease complications for the patient, and would require little to no additional training. This invention is directed to solve these problems and satisfy a long-felt need.
SUMMARY OF THE INVENTION
• The present invention contrives to solve the disadvantages of the prior art. The present invention is directed to a tissue approximation clip system.
• An object of the present invention is to provide a gastrointestinal tissue approximation clip (“GI TAC”) system for approximating tissue defects, the GI TAC system comprising: an applicator that is sized to travel through an instrument channel of an endoscope; first and second tissue approximation clips that are transported to first and second locations of a tissue defect respectively by the applicator to approximate the tissue defect; first and second sutures attached to the first and second tissue approximation clips respectively; and a clip approximation means for approximating the first and second tissue approximation clips. The clip approximation means is sized to travel through the instrument channel, the first and second tissue approximation clips are sized to travel through the instrument channel, and the first and second tissue approximation clips are adapted to be detachably coupled to the applicator.
• Another object of the present invention is to provide a GI TAC system for approximating tissue defects, the GI TAC system comprising: an applicator that is sized to travel through an instrument channel of an endoscope; first and second tissue approximation clips that are transported to the first and second locations of a tissue defect respectively by the applicator to approximate the tissue defect; and first and second sutures attached to the first and second tissue approximation clips respectively. The first and second tissue approximation clips are sized to travel through the instrument channel, and the first and second tissue approximation clips are adapted to be detachably coupled to the applicator.
• Yet another object of the present invention is to provide a method for approximating a tissue defect using a GI TAC system, the method comprising the steps of: positioning a distal end of an insertion tube of an endoscope towards a tissue defect inside of a patient; directing, via an applicator, a first tissue approximation clip, detachably attached to the applicator, through an instrument channel of the endoscope and towards the tissue defect; placing the first tissue approximation clip on a first location of the tissue defect and clamping the first tissue approximation clip thereon; detaching the applicator from the first tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope; directing, via the applicator, a second tissue approximation clip, detachably attached to the applicator, through the instrument channel of the endoscope and towards the tissue defect; placing the second tissue approximation clip on a second location of the tissue defect and clamping the second tissue approximation clip thereon; and detaching the applicator from the second tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope. First and second sutures are attached to the first and second tissue approximation clips respectively. Furthermore, each of the first and second tissue approximation clips includes: a body portion; and a grasping portion coupled to the body portion. The body portion is detachably coupled to the applicator. The grasping portion includes a movable jaw that is constructed to move from a spaced-apart position to an approximated position, or move from the approximated position to the spaced-apart position. The grasping portion is configured to grasp onto tissue during the placing steps.
• Yet another object of the present invention is to provide a gastrointestinal tissue approximation clip (“GI TAC”) system for approximating tissue defects, the GI TAC system including an applicator that is sized to travel through an instrument channel of an endoscope; a plurality of tissue approximation clips that are transported to a plurality of locations about a tissue defect by the applicator; a suture coupled to at least one of the tissue approximation clips; and a clip approximation means for approximating the tissue approximation clips. The clip approximation means and the tissue approximation clips are sized respectively to travel through the instrument channel. Additionally, the tissue approximation clips are adapted to be detachably coupled to the applicator.
• Yet another object of the present invention is to provide A method for approximating a tissue defect using a gastrointestinal tissue approximation clip (“GI TAC”) system, the method including the steps of: positioning a distal end of an insertion tube of an endoscope towards a tissue defect inside of a patient; directing, via an applicator through an instrument channel of the endoscope and towards the tissue defect, a first tissue approximation clip of a plurality of tissue approximation clips, the first tissue approximation clip detachably attached to the applicator and coupled to a suture; placing the first tissue approximation clip on a first location about the tissue defect and clamping the first tissue approximation clip thereon; detaching the applicator from the first tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope; threading the suture through a pass-through hole of a second tissue approximation clip of the plurality of tissue approximation clips; directing, via the applicator, the second tissue approximation clip, detachably attached to the applicator, through the instrument channel of the endoscope and towards the tissue defect; placing the second tissue approximation clip on a second location about the tissue defect and clamping the second tissue approximation clip thereon; and detaching the applicator from the second tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope.
• The advantages of the present invention are: (1) the endoscopist does not need to take the endoscope out of the patient to use the GI TAC system; (2) endoscopists and their assistants are familiar with using clips, thus the GI TAC system will be easy to use and quick to learn; (3) the clips are sized to fit through an instrument channel of an endoscope, thus removing the need for removal of the endoscope from the patient, fitting a device or clip over the distal end of the endoscope, and then re-introducing the endoscope, and its distal end, back into the patient; (4) jaw portions of the tissue approximation clips that are constructed to provide additional hold onto the tissue; (5) time savings from not having to withdraw the endoscope out of the patient to use this invention, thus decreasing the risk of patient morbidity and mortality; (6) the GI TAC system and method can be deployed using scopes already in the market and operating rooms thus saving costs; (7) the GI TAC system and method can ensure precision equivalent to surgical staples that are still employed by practitioners/physicians; and (8) the simplicity and flexibility of the GI TAC system and method in their application and the strength that the GI TAC system and method provides in approximating and holding tissues together.
• Although the present invention is briefly summarized, the fuller understanding of the invention can be obtained by the following drawings, detailed description and appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
• These and other features, aspects and advantages of the present invention will become better understood with reference to the accompanying drawings, wherein:
• FIG. 1 shows a traditional endoscopic clip;
• FIGS. 2A-B show tissue approximation clips according to embodiments of the present invention;
• FIGS. 3A-D show tissue approximation clips according to embodiments of the present invention withFIGS. 3A-B showing the formation of a tissue approximation clip complex;
• FIGS. 4A-L show a method for closure of a defect using a tissue approximation clip system according embodiments of the present invention;
• FIG. 5 shows a device for final deployment of the tissue approximation complex according to embodiments of the present invention;
• FIGS. 6A-E show an alternative device for final deployment of the tissue approximation complex according to embodiments of the present invention;
• FIGS. 7A-E shows an alternative device for final deployment of the tissue approximation complex according to embodiments of the present invention;
• FIG. 8 shows a cutting device according to embodiments of the present invention;
• FIGS. 9A-C show a device for use with the tissue approximation clip system according to embodiments of the present invention;
• FIGS. 10A-C show various views of tissue approximation clips according to embodiments of the present invention;
• FIGS. 11A-C show a tissue approximation clip according to embodiments of the present invention;
• FIGS. 12A-B show a tissue approximation clip according to embodiments of the present invention;
• FIGS. 13A-D show tissue approximation clips according to embodiments of the present invention; and
• FIGS. 14A-J show a method for closure of a defect using the tissue approximation clip system according to embodiments of the present invention.
DETAILED DESCRIPTION EMBODIMENTS OF THE INVENTION
• Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, which form a part of this disclosure. It is to be understood that this invention is not limited to the specific devices, methods, conditions or parameters described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only and is not intended to be limiting of the claimed invention.
• Also, as used in the specification including the appended claims, the singular forms “a”, “an”, and “the” include the plural, and reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. Ranges may be expressed herein as from “about” or “approximately” one particular value and/or to “about” or “approximately” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent “about”, it will be understood that the particular value forms another embodiment.
• Also, as used in the specification including the appended claims, “first and second sutures” may denote two individual suture strands, or first and second ends of a single suture strand.
• FIG. 2A shows atissue approximation clip100 for approximatingtissue defects20. Thetissue approximation clip100 includes abody portion110 and a graspingportion120 coupled to thebody portion110, wherein the graspingportion120 includes a jaw having a first andsecond jaw portions1201,1202. The jaw of the graspingportion120 is preferably of a rat-tooth type configuration as shown inFIG. 2A. The first andsecond jaw portions1201,1202 are constructed to move from a spaced-apart position to an approximated position, or move from the approximated position to the spaced-apart position. In the approximated position, the first andsecond jaw portions1201,1202 may be fully closed against each other or closed upon a portion of a tissue of a patient. Other designs and configurations with respect to thejaw portions1201,1202 of the graspingportion120 may be considered that do not depart from the spirit and scope of the invention so long as the jaw is constructed to open and close whereupon closure of the jaw onto tissue provides sufficient clamping and hold onto the tissue.
• Thebody portion110 is detachably coupled to anapplicator400. Furthermore, thebody portion110 may be substantially cubic, substantially prismatic, substantially rectangular prism, substantially circular spherical, substantially oblate spheroidal, substantially prolate spheroidal, substantially columnar, or substantially cylindrical. Preferably, thebody portion110 is substantially cubic, substantially rectangular prism, or substantially prismatic. For thebody portion110 that is substantially spherical, substantially oblate spheroidal, substantially prolate spheroidal, substantially columnar, or substantially cylindrical, at least one surface of thebody portion110 is preferably substantially flat for ease of pairing onetissue approximation clip101 with anothertissue approximation clip102. Overall, thetissue approximation clip100 may be shorter and smaller thantraditional clips10 to permit theapplicator400 to bring the pair of tissue approximation clips101,102 to be closer to each other, minimizing the gap between the twoapproximation clips101,102, and thus, create a tighter closure of thetissue defect20 itself.
• As shown inFIG. 2B, to further aid in the pairing of two tissue approximation clips101,102, thebody portion110 of a firsttissue approximation clip101 may be magnetic and thebody portion110 of a secondtissue approximation clip102 may be ferromagnetic, or vice versa. Alternatively, the graspingportion120 of the firsttissue approximation clip101 may be magnetic and the graspingportion120 of the secondtissue approximation clip102 may be ferromagnetic, or vice versa. Preferably, thebody portions110 of the first and second tissue approximation clips101,102 are magnetic and ferromagnetic respectively, or vice versa.
• Additionally, thebody portions110 of the first and second tissue approximation clips101,102 may include joiningmeans130 as shown inFIGS. 3C-D. The joining means130 are complimentary structures that allow the tissue approximation clips101,102 to collapse tightly onto each other upon magnetic attraction when they are brought close together. For example, as shown inFIG. 3C, the joining means130 of the firsttissue approximation clip101 may be at least one substantially semi-spherical projection and the joining means130 of the secondtissue approximation clip102 may be at least one groove constructed to receive the semi-spherical projection of the firsttissue approximation clip101, or vice versa. Alternatively, as shown inFIG. 3D, the joining means130 of the firsttissue approximation clip101 may be one or more projecting ridges and the joining means130 of the secondtissue approximation clip102 may be one or more grooves constructed to receive any of the projecting ridges of the firsttissue approximation clip101, or vice versa with the joining means130 of the firsttissue approximation clip101 being one or more grooves and the joining means130 of the secondtissue approximation clip102 being one or more projecting ridges. Alternatively, the joining means130 of the firsttissue approximation clip101 may be at least one substantially prismatic projection and the joining means130 of the second tissue approximation clip102 (complimentary to the joining means130 of the first tissue approximation clip101) may be at least one groove constructed to receive therein the substantially prismatic projection of the firsttissue approximation clip101, or vice versa. Overall, the joining means130 of onetissue approximation clip101 may be a raised projection of any shape and number that is complimentarily received in the joining means130 of the othertissue approximation clip102. Furthermore, at least one face of thebody portion110 of a firsttissue approximation clip101 may feature a joiningmeans130 and at least one face of thebody portion110 of a secondtissue approximation clip102 may feature a joining means130 that is complimentary to the joining means130 of the firsttissue approximation clip101.
• Overall, thetissue approximation clip101 is shorter thantraditional clips10 in order to transport the tissue approximation clips101,102 to the hole/defect itself for a tighter closure. Additionally, thebody portions110 of the first and second tissue approximation clips101,102 of the tissueapproximation clip system100 may include the joining means130 as described above. Other designs and configurations with respect to the jaw of the graspingportion120 may be considered that do not depart from the spirit and scope of the invention so long as the jaw is constructed to open in a spaced-apart position (of varying degrees) and close in an approximated position whereupon closure of the jaw onto any position about thetissue defect20 provides sufficient clamping to hold onto the clamped position of thetissue defect20.
• As shown inFIGS. 3A-B, asuture201 is attached to thetissue approximation clip101. Thesuture201 can be made from any materials, or combination thereof, known in the art, which includes synthetic absorbables (e.g. polyglycolic acid, polylactic acid, Monocryl, and polydioxanone) and synthetic non-absorbables (nylon, polyester, PVDF and polypropylene). Thesuture201 aids in the pairing of the tissue approximation clips101 where tension (e.g. from a pull) is applied to thesutures201,202 (after the respective first and second tissue approximation clips101,102 are clamped to first and second positions of thetissue defect20 respectively), which brings the clamped first and second tissue approximation clips101,102 closer together such that they eventually pair together (through magnetic attraction and/or other means) as shown inFIGS. 2B and 3A-B to form atissue approximation complex150. Thesuture201 may be attached to the graspingportion120 of thetissue approximation clip101. Alternatively, thesuture201 is attached to thebody portion110 of thetissue approximation clip101. Preferably, thesuture201 is attached to an area or a junction between thebody portion110 and the graspingportion120 of the tissue approximation clip as shown inFIGS. 3A-B. Additionally, thebody portion110 also detachably couples to anapplicator400 as discussed below.
• As shown inFIGS. 4A-L, a tissueapproximation clip system100 is provided. As shown, the tissueapproximation clip system100 includes anapplicator400 that is sized to travel through aninstrument channel310 of anendoscope300; first and second tissue approximation clips101,102 that are transported to first and second locations of atissue defect20 respectively by theapplicator400 to approximate the tissue defect; first andsecond sutures201,202 attached to the first and second tissue approximation clips101,102 respectively; and a clip approximation means for approximating the first and second tissue approximation clips101,102. The clip approximation means is sized to travel through theinstrument channel310. The first and second tissue approximation clips101,102 are sized to travel through theinstrument channel310, and are adapted to be detachably coupled to theapplicator400.
• Theendoscope300 is introduced into the patient through an opening of the patient or an opening provided by an incision. As shown inFIG. 4A, the distal end of aninsertion tube320 of the endoscope300 (i.e. the distal end of the endoscope300) is directed towards thetissue defect20. Thetissue defect20 shown inFIG. 4A and in other figures (here, a tear in the body wall of the stomach of a patient) is for illustrative purposes only. Thetissue approximation system100 can be used at any location that is accessible by theendoscope300. As shown inFIGS. 4B-D, theapplicator400 transports the first and second tissue approximation clips101,102 (described above) individually and sequentially to first and second locations of thetissue defect20 respectively. Also shown is how each of the first and second tissue approximation clips101,102 has a suture attached to thereon as described above. Specifically, thefirst suture201 is attached to the firsttissue approximation clip101 as shown inFIGS. 4C and 4D prior to entry thereof into and transport through theinstrument channel310 of theendoscope300, likewise for thesecond suture202 and the secondtissue approximation clip102. Thefirst suture201 includes a proximal end and a distal end wherein the distal end of thefirst suture201 attaches to the firsttissue approximation clip101 to be inserted into theinstrumental channel310 of theendoscope300 and directed towards the first position of thetissue defect20 via theapplicator400. Furthermore, thesecond suture202 includes a proximal end and a distal end wherein the distal end of thesecond suture202 attaches to the secondtissue approximation clip201 to be inserted into theinstrumental channel310 of theendoscope300 and directed towards the second position of thetissue defect20. Alternatively, the first andsecond sutures201,202 may denote opposite ends of a single suture.
• The clip approximation means may be acatheter device501 as shown inFIGS. 4E and 5, acatheter device502 as shown inFIGS. 6A-E, or asuture adjoining clamp601 as shown inFIGS. 7A-D. Thecatheter device501 as shown inFIGS. 4E and 5 is disposed at distal end of its own applicator, the distal end of the applicator directed towards thetissue defect20. As shown, thecatheter device501 includes aslidable blade520 and a through-hole510. Theslidable blade520 may be installed within thecatheter device501 and positioned about the through-hole510 with the practitioner/physician controlling theslidable blade520 of thecatheter device501. The through-hole510 of thecatheter device501 permits the first andsecond sutures201,202 to pass therethrough, and theslidable blade520 is to cut the first andsecond sutures201,202 from the first and second tissue approximation clips101,102 respectively.
• When approaching the first and second tissue approximation clips101,102, thecatheter device501 tensions the first andsecond sutures201,202 such that they are brought closer together. By bringing thesutures201,202 closer together when the first andsecond sutures201,202 are tensioned and/or pulled, the firsttissue approximation clip101 approaches the secondtissue approximation clip201 and both of the tissue approximation clips101,201 substantially and magnetically couples to each other into atissue approximation complex150 as shown in the sequence depicted inFIG. 5.
• Alternatively, as shown inFIGS. 6A-E, the clip approximation means may be acatheter device502 which includes aslidable blade520 and a through-hole510. Theslidable blade520 may be installed within thecatheter device502 and positioned about the through-hole510 with the practitioner/physician controlling theslidable blade520 of thecatheter device502. The through-hole510 of thecatheter device502 permits the first andsecond sutures201,202 to pass therethrough, and theslidable blade520 is to cut the first andsecond sutures201,202 from the first and second tissue approximation clips101,102 respectively. Furthermore, as shown, thecatheter device502 further includes: atube505 which includes anend512 and the through-hole510; aninner rod530 that extends from thetube505; and aball540 detachably coupled to theinner rod530. Theend512 of thetube505 is open to permit the first andsecond sutures201,202 to pass through the openedend512 of thetube505.
• When theinner rod530 is retracted to thetube505 as shown inFIGS. 6B-C, theball540 is constructed to snap onto asocket542 and trap, and thus securing, the first andsecond sutures201,202 between theball540 andsocket542 to form a ball-and-socket complex550 and detach from theinner rod530. Theinner rod530 is in an extended position at first and then the practitioner/physician can retract theinner rod530 back to thetube505. Theslidable blade520 may be installed within thecatheter device502 and positioned about the through-hole510 with the practitioner/physician controlling theslidable blade520 of thecatheter device502. As shownFIG. 6D, theslidable blade520, controlled by a handle positioned outside of the patient, is then used to cut the first andsecond sutures201,202 to release the ball-and-socket complex550. As shown inFIG. 6E, the ball-and-socket complex550 holds the first andsecond sutures201,202 tightly against the first and second tissue approximation clips101,102, thus pulling on the two tissue approximation clips101,102 tightly towards each other (i.e. the ball-and-socket complex550 approximates the twoapproximation clips101,102). Therefore, the first and second tissue approximation clips101,102 need not be magnetically attracted to each other here, as the ball-and-socket complex550 brings the first and second tissue approximation clips tightly to each other to form the tissueapproximation clip complex150.
• Alternatively, as shown inFIGS. 7A-D, the clip approximating means may be asuture adjoining clamp601. Thesuture adjoining clamp601 includesmovable arms611,612 as shown inFIG. 7A. Each of thearms611,612 includes agrip614 and a through-hole616 through which threading of the first andsecond sutures201,202 are permitted. To thread thesutures201,202 through thesuture adjoining clamp601, apre-loaded suture threader640 may be used as shown inFIG. 7E. Thearms611,612 of thesuture adjoining clamp601 are movable from a spaced-apart position to an approximated position, and movable from the approximated position to the spaced-apart position. Furthermore, thesuture adjoining clamp601 does not have to open wide. Additionally, thesuture adjoining clamp601 may configured with a half-way lock or soft lock for thearms611,612 so that thesuture adjoining clamp601 may be pushed down theinstrument channel310 using a suture adjoiningclamp applicator410 without getting caught somewhere while traveling through theinstrument channel310 towards thetissue defect20. The suture adjoiningclamp applicator410 is similar to theapplicator400 described above. As shown inFIGS. 7B-C, once at thetissue approximation complex150, thesuture adjoining clamp601 may be brought up against thetissue approximation complex150 and then clamped down. When, the first andsecond sutures201,202 are between thegrips614, and thearms611,612 are in the approximated position, thegrips614 meet each other and firmly hold down the first andsecond sutures201,202 as shown inFIG. 7C. Thegrips614 may be made from any material known in the art. Preferably, thegrips614 are made of soft material such as rubber.
• As shown inFIGS. 7A-D, when thesuture adjoining clamp601 is used to approximate the first and second tissue approximation clips101,102, a cutting means for cutting the first andsecond sutures201,202 is deployed. As shown inFIGS. 7A-C, the suture adjoiningclamp applicator410 may further include the cutting means in the form of aslidable sheath620 having a sharpenedouter edge622. A width of theslidable sheath620 is greater than a width of thesuture adjoining clamp601. Accordingly, theouter edge622 of theslidable sheath620 is configured to slide across the first andsecond sutures201,202 that are presented by at least one of the through-holes616 of thearms611,612 to cut the first andsecond sutures201,202.
• Alternatively, as shown inFIG. 8, the cutting means may be acutting device720 which includes atube722 having anend724; a side through-hole726; and acutting blade728 that is constructed to slide down to close theend724 or slide up to open theend724. The first andsecond sutures201,202 are threaded through theopen end724 and the side through-hole726 when theblade728 is pulled up; the threading process may be aided by thepre-loaded suture threader640 as shown inFIG. 7E. As shown inFIG. 8, thecutting device720 is sized to pass through theinstrument channel310 of theendoscope300 with theend724 of thecutting device720 being directed towards thetissue defect20. Procedurally, when thesuture adjoining clamp601 is used, thedevice720 follows the suture adjoiningclamp applicator410 after the latter transported thesuture adjoining clamp601 to the first andsecond clips101,102 to approximate the first andsecond clips101,102 into atissue approximation complex150 and adjoin thesuture adjoining clamp601 to thetissue approximation complex150. Thecutting blade728 cuts the first andsecond sutures201,202 when thecutting blade728, controlled by the practitioner/physician, slides down upon the first andsecond sutures201,202 to close theend724. Since the first andsecond sutures201,202 can be brought together using thesuture adjoining clamp601, there is no need to target thesutures201,202 individually at the GI lumen level as one would have to with other cutting devices.
• Thecutting device720 shown inFIG. 8 may be adapted to be used with thecatheter device501 similar to that shown inFIGS. 4E and 5 and thecatheter device502 similar to that shown inFIGS. 6A-E. Thecatheter device501, as shown inFIGS. 4E and 5, and thecatheter device502, as shown inFIGS. 6A-E, are disposed at distal end of theirown applicator400, the distal end of theapplicator400 directed towards thetissue defect20. As shown, thecatheter devices501 and502 include a through-hole510. The through-holes510 of thecatheter devices501,502 permit the first andsecond sutures201,202 to pass therethrough.
• When approaching the first and second tissue approximation clips101,102, the catheter device similar to thecatheter device501 tensions the first andsecond sutures201,202 such that they are brought closer together. By bringing thesutures201,202 closer together when the first andsecond sutures201,202 are tensioned and/or pulled, the firsttissue approximation clip101 approaches the secondtissue approximation clip201 and both of the tissue approximation clips101,201 (constructed here to magnetically attract each other) substantially and magnetically couples to each other into atissue approximation complex150 similar to the sequence depicted inFIG. 5 but without the depictedslidable blade520. Thecutting device720 as shown inFIG. 8 may be threaded with the first andsecond sutures201,202 and transported through theinstrument channel310 of theendoscope300 towards thetissue approximation complex150. Without the need for the practitioner/physician to grab thesutures201,202 and position them within the cutting devices known in the art at the level of thetissue defect20, which may prove to be challenging to the practitioner/physician. Rather, thecutting device720 is advantageous for grabbing thesutures201,202 at the level of theport330 of theinstrument channel310 and allows capturing of bothsutures201,202 at the same time; theport330, as shown inFIG. 8A, is disposed at or about the proximal end of theinstrument channel310, whereas the distal end of theinstrument channel310 lies at or about the distal end ofinsertion tube320.
• Thecutting device720 shown inFIG. 8 may be adapted to be used with thecatheter device502 similar to that shown inFIGS. 6A-E. Thecatheter device502 here further includes atube505 which includes anend512 and a through-hole510; aninner rod530 that extends from thetube505; and aball540 detachably coupled to theinner rod530. Theend512 of thetube505 is open to permit the first andsecond sutures201,202 to pass through the openedend512 of thetube505. The through-hole510 of thecatheter device502 permits the first andsecond sutures201,202 to pass therethrough. After theball540 substantially adjoins the first and second tissue approximation clips101,102 as shown inFIG. 6C, theinner rod530 is detached from theball540. Thecatheter device502 is then pulled back away from the tissue defect. Thecutting device720, as shown inFIG. 8, may be threaded with the first andsecond sutures201,202 and transported through theinstrument channel310 of theendoscope300 towards theball540 substantially adjoined to the first and second tissue approximation clips101,102. Without the need to approach thetissue approximation complex150, the operator of thecutting device720 may cut the first and second sutures at a distance from thetissue approximation complex150 to release theball540 and the first and second tissue approximation clips101,102 as a ball-and-socket complex550 as shown inFIG. 6E.
• FIGS. 4A-L illustrate a method for approximating atissue defect20 using a gastrointestinal tissue approximation clip (“GI TAC”) system, the method including the steps of positioning a distal end of aninsertion tube320 of anendoscope300 towards a tissue defect inside of a patient as shown inFIG. 4A; directing, via anapplicator400, a firsttissue approximation clip101, detachably attached to theapplicator400, through aninstrument channel310 of theendoscope300 and towards thetissue defect20 as shown inFIG. 4B; placing the firsttissue approximation clip101 on a first location of thetissue defect20 and clamping the firsttissue approximation clip101 thereon as shown inFIG. 4C; detaching theapplicator400 from the firsttissue approximation clip101 and withdrawing theapplicator400 from theinstrument channel310 of theendoscope300 as shown inFIG. 4C; directing, via theapplicator400, a secondtissue approximation clip102, detachably attached to theapplicator400, through theinstrument channel310 of theendoscope300 and towards thetissue defect20.
• With regards to the secondtissue approximation clip102, the method further includes: placing the secondtissue approximation clip102 on a second location of thetissue defect20 and clamping the secondtissue approximation clip102 thereon; and detaching theapplicator400 from the second tissue approximation clip and withdrawing theapplicator400 from theinstrument channel310 of theendoscope300, the results of which are shown inFIG. 4D. For this method, first andsecond sutures201,202 are attached to the first and second tissue approximation clips101,102 respectively as shown inFIGS. 3A-B andFIG. 4D.
• Each of the first and second tissue approximation clips101,102 includes: abody portion110; and a graspingportion120 coupled to thebody portion110. Thebody portion110 is detachably coupled to theapplicator400. The graspingportion120 is configured to grasp onto tissue during the placing steps. The graspingportion120 includes a movable jaw that is constructed to move from a spaced-apart position to an approximated position, or move from the approximated position to the spaced-apart position. In the approximated position, the first andsecond jaw portions1201,1202 may be fully closed against each other or closed upon a portion of a tissue of a patient. Other designs and configurations with respect to thejaw portions1201,1202 of the graspingportion120 may be considered that do not depart from the spirit and scope of the invention so long as the jaw is constructed to open and close whereupon closure of the jaw onto tissue provides sufficient clamping and hold onto the tissue.
• Additional steps to the method include threading the first andsecond sutures201,202, as shown inFIG. 4E, through a clip approximation means for approximating the first and second tissue approximation clips101,102. Further, directing the clip approximating means towards the first and second tissue approximation clips101,102 such that the firsttissue approximation clip101 moves towards the secondtissue approximation clip102, the secondtissue approximation clip102 moves towards the firsttissue approximation clip101, or the first and second approximation clips101,102 move towards each other such that the first and second tissue approximation clips101,102 approximates (with approximation via magnetic attraction as an option) with each other to form a tissueapproximation clip complex150 as shown inFIGS. 4F-H; and cutting, using the clip approximation means or the cutting means, the first andsecond sutures201,202 from the first and second tissue approximation clips101,102, wherein the first and second locations of thetissue defect20 are approximated to each other following the directing step as shown inFIG. 4I. As shown, the clip approximation means is sized to travel through theinstrument channel310 of theendoscope300.
• In this method, the clip approximation means is acatheter device501, acatheter device502, or asuture adjoining clamp601. Each of thecatheter devices501,502 include aslidable blade520 and a through-hole510 which permits threading of the first andsecond sutures201,202 therethrough as shown inFIG. 5 for thecatheter device501 and as shown inFIG. 6A-E for thecatheter device502. When thecatheter device501, or thecatheter device502, is used in the cutting step, theslidable blade520 cuts the first andsecond sutures201,202 as shown inFIGS. 5 and 6D. Thesuture adjoining clamp601, as shown inFIGS. 7A-D, includesmovable arms611,612 where each of thearms611,612 of thesuture adjoining clamp601 includes agrip614 and a through-hole616 through which permits threading of the first andsecond sutures201,202. As shown inFIG. 4D, suture adjoiningclamp601 is detachably coupled to theapplicator410. Furthermore, thearms611,612 of thesuture adjoining clamp601 are movable from a spaced-apart position to an approximated position, and movable from the approximated position to the spaced-apart position. When thesuture adjoining clamp601 is used in the cutting step, thesuture adjoining clamp601 may include a cutting means in the form of aslidable sheath620 having a sharpenededge622 as described above. Alternatively, the cutting means is acutting device720 as shown inFIG. 8, which includes atube722 having anend724, a side through-hole726, and acutting blade728, follows thesuture adjoining clamp601 after thesuture adjoining clamp601 approximated the first and second tissue approximation clips101,102 into atissue approximation complex150 and adjoined to thetissue approximation complex150. As shown inFIG. 8, thecutting device720, having the first andsecond sutures201,202 threaded through theend724 and the side through-hole726, is brought towards thesuture adjoining clamp601 and thetissue approximation complex150 to cut the first andsecond sutures201,202, as described above. Furthermore, thecutting device720 may be adapted for use with thecatheters501,502 as shown inFIGS. 5 and 6A and as described above.
• With regards to the clip approximation means as thecatheter device502, as shown inFIG. 6, further includes thetube505 which includes anend512 and a through-hole510; aninner rod530 that extends from thetube505; aball540 detachably coupled to theinner rod530; and aslidable blade520. The through-hole510 permits threading of the first andsecond sutures201,202 therethrough. Theend512 of thetube505 is open to permit the first andsecond sutures201,202 to pass through the openedend512 of thetube505. The method using thiscatheter device501 may include an additional step of retracting, following the directing step and prior to the cutting step, theinner rod530 of thecatheter device502 into thetube505 of thecatheter device502 such that theball540 of thecatheter device502 snaps onto the first andsecond sutures201,202 to form a ball-and-socket complex550 that is released following the cutting step.
• As shown inFIGS. 2B, 3A-B,4A-L,5,6A-E, and7A-D, the first and second tissue approximation clips101,102 adhere to each other via magnetic force or other means (the ball-and-socket complex550 shown inFIGS. 6A-E or thesuture adjoining clamp601 shown inFIGS. 7A-D) to form a tissueapproximation clip complex150 that further approximates thetissue defect20; thetissue approximation complex150 may be included in a ball-and-socket complex550 as shown inFIG. 6E or be adjoined to asuture adjoining clamp601 as shown inFIG. 6D. As shown inFIG. 4L, at least one tissueapproximation clip complex150 is clamped along the length of the defect. Following proper clamping of the tissueapproximation clip complexes150 along the length of the defect, the defect is finally closed by applying tissue closure clips160 at around the tissueapproximation clip complex150 of the semi-closed defect after opposing sides of the defect are brought substantially close together by at least one of the tissueapproximation clip complexes150 as shown. Alternatively, if the at least one tissueapproximation clip complex150 sufficiently approximates the defect such that the defect resembles a substantially straight or a curved line save for opposite ends of the line having a substantially small opening, then tissue closure clips160 may be applied onto the substantially small opening of the opposite ends of the line to close them.
• To further control the first andsecond sutures201,202 that are attached to the first and second tissue approximation clips101,102 respectively, the tissueapproximation clip system100 may further include asuture locking apparatus800 as shown inFIGS. 9A-C. As shown inFIGS. 9B-C, thesuture locking apparatus800 includes anouter shell802 which includes acavity804, a through-hole806, and anattachment portion808. Thesuture locking apparatus800 may further include asuture guide810 constructed to fit into thecavity804 of theouter shell802 and first andsecond clamps821,822 to hold the first andsecond sutures201,202 respectively. For further adjustment of thesutures201,202, either the first andsecond clamps821,822 (or both) may be operated to release the hold that theclamps821,822 have on thesutures201,202. Theattachment portion808 of theouter shell802 is constructed to detachably attach thesuture locking apparatus800 onto theinstrument channel310 of theendoscope300. Procedurally, thesuture locking apparatus800 is detachably coupled to aport330 of theinstrument channel310 of theendoscope300 prior to transport of the firsttissue approximation clip101 as shown inFIG. 9A.
• As shown inFIG. 9B, thesuture guide810 includes a through-hole816 wherein the first andsecond sutures201 pass through the through-hole806 of theouter shell802 and the through-hole816 of thesuture guide810. Thesuture guide810 may be molded from any elastomer known in the art including, but not limited to, synthetic rubber, thermoplastic elastomers, and the like. Preferably, thesuture guide810 is molded from synthetic rubber. Additionally, the method for approximating closure of a defect may further employ the use of thesuture locking apparatus800 ofFIGS. 9A-B to hold the first andsecond sutures201,202.
• In another embodiment, a gastrointestinal tissue approximation clip (“GI TAC”) system is provided for approximatingtissue defects20, the GI TAC system including: anapplicator400 that is sized to travel through aninstrument channel310 of anendoscope300; a plurality of tissue approximation clips100 that are transported to a plurality of locations about atissue defect20 by theapplicator400; asuture200 coupled to at least one of the tissue approximation clips100; and a clip approximation means for approximating the tissue approximation clips100—the clip approximation means in this embodiment is similar to those embodiments previously described. Furthermore, the tissue approximation clips100 are sized respectively to travel through theinstrument channel310, and the tissue approximation clips100 are adapted to be detachably coupled to theapplicator400.
• As described in the earlier embodiments, each of the tissue approximation clips100 of this embodiment includes abody portion110; and a graspingportion120 that is coupled to thebody portion110. The graspingportion120 includes first andsecond jaw portions1201,1202 that are constructed to move from a spaced-apart position to an approximated position, and move from the approximated position to the spaced-apart position. Furthermore, the graspingportion120 is constructed to grasp a portion of a tissue about thetissue defect20, preferably about 5 mm to about 10 mm from an edge of thetissue defect20. Thebody portion110 is constructed to be detachably coupled to theapplicator400. Optionally, the tissue approximation clips100 can be constructed to magnetically attract each other. Also in this embodiment, the tissue approximation clips100 further includes a pass-throughhole141. Thishole141 is sized for thesuture200.
• The first andsecond jaw portions1201,1202 of the graspingportion120 may be of a rat-toothed configuration as shown inFIGS. 2A-B and described above.FIGS. 10A-C shows an alternative to the rat-toothed configuration, wherein an end of thefirst jaw portion1201 includes aprotrusion1211, and thesecond jaw portion1202 includes ahole1212, thehole1212 constructed to accommodate theprotrusion1211 when thefirst jaw portion1201 is closed with thesecond jaw portion1202 as shown inFIG. 10C. Theprotrusion1211 may be conical, pyramidal, or prismatic. Preferably, theprotrusion1211 is conical.
• Alternatively, as shown inFIGS. 11A-C, the first andsecond jaw portions1201,1202 may include a plurality ofprotrusions1221,1222 that formconcave portions1223 of the first andsecond jaw portions1201,1202 respectively. Theprotrusions1221,1222 shown inFIGS. 11A-C resemble an array or row of teeth (or, an array or row of serrations) on the first andsecond jaw portions1201,1202 respectively. As shown, theprotrusions1221 of thefirst jaw portion1201 are not aligned with respect to theprotrusions1222 of thesecond jaw portion1202 such that theprotrusions1221 of thefirst jaw portion1201 fit inconcave portions1223 of thesecond jaw portion1202, and theprotrusions1222 of thesecond jaw portion1202 fit in theconcave portions1223 of thefirst jaw portion1201—preferably in an interlocking manner when the first andsecond jaw portions1201,1202 are closed together. If theprotrusions1221,1222 were aligned with each other, then they would not interlock with each other when the first andsecond jaw portions1201,1202 are closed together. The size of theprotrusions1221,1222 of the first andsecond jaw portions1201,1202 may be uniform. Alternatively, the size of theprotrusions1221,1222 may increase (or decrease) from a first end of the graspingportion120 to the second end of the graspingportion120, wherein the first end of the graspingportion120 is directed towards thebody portion110, and the second end of the graspingportion120 is directed away from thebody portion110. Alternatively, the size of theprotrusions1221,1222 may be variable from the first end of the graspingportion120 to the second end of the graspingportion120. Alternatively, there may be groups of two ormore protrusions1221,1222 that increase (or decrease) in size from the first end of graspingportion120 to the second end of the graspingportion120.
• As shown inFIGS. 12A-B, the tissue approximation clips100 (those that include abody portion110 and a graspingportion120 that is coupled to the body portion110) may further include acorkscrew element1230 that is configured to interact with the tissue. As shown inFIG. 12B, the first andsecond jaw portions1201,1202 are constructed to open up to 180° from each other. Preferably, the first andsecond jaw portions1201,1202 open to approximately 180° from each other so that thecorkscrew element1230 can burrow itself (and penetrate) into the tissue before the first andsecond jaw portions1201,1202 can be brought back together and grasp a tissue portion that is situated about thetissue defect20. Furthermore, the tissue approximation clips100 shown inFIGS. 12A-B may incorporate, in its graspingportion120, the rat-toothed configuration as shown inFIG. 2A, theprotrusion1211 andhole1212 configuration as shown inFIGS. 10A-C, the plurality ofprotrusions1221,1222 configuration as shown inFIGS. 11A-C, or any configurations for the graspingportion120 that do not depart from the spirit and scope of this embodiment, or those that are known in the art.
• As shown inFIG. 13A, the graspingportion120 includes at least one pass-throughhole141. Thefirst jaw portion1201, thesecond jaw portion1202, or both of the first andsecond jaw portions1201,1202 may include the pass-throughhole141 that is sized for thesuture200. Not only may thesuture200 traverse through the pass-throughhole141 but also thesuture200 may be tied or coupled to thetissue approximation clip100 via the pass-throughhole141. For example, thesuture200 may be tied to thetissue approximation clip100 by using the pass-throughhole141 to tie thesuture200 to itself; alternatively, thesuture200 may be fused onto itself using the pass-throughhole141; alternatively, thesuture200 may be trapped between thebody portion110 and the graspingportion120; or otherwise fixed to thetissue approximation clip100. In this embodiment, thesuture200 is preferably coupled to the first tissue approximation clip101 (otherwise known as the lead approximation clip) because the firsttissue approximation clip101 is the first of the tissue approximation clips100 to target thetissue defect20 and grasp a tissue about thetissue defect20.
• Alternatively, as shown inFIG. 13B, the tissue approximation clips100 may include a suture attach ring140 (“SAR”) that forms the pass-throughhole141. Here, thering140 is disposed in the graspingportion120 that is approximate to thebody portion110, the pass-throughhole141 being sized to permit thesuture200 to pass therethrough. Thering140 can be either round (“O” shaped) or any another shape that is suitable for the purpose of attaching thesuture200 and/or permitting thesuture200 to traverse the pass-throughhole141.
• Alternatively, as shown inFIG. 13C, thering140 may be disposed on thebody portion110 of thetissue approximation clip100. As shown inFIG. 13C, thering140 further includes aloop142 that forms the pass-throughhole141. To fit thering140 on thebody portion110, thebody portion110 further includes a surroundinggroove112 as shown inFIG. 13D (ring140 omitted) that accepts a portion of thering140 therein. Thegroove112 is constructed to keep thering140 positioned about thegroove112. Additionally, thering140 is configured to be rotatable about thegroove112. For the tissue approximation clips100 shown inFIGS. 13A-B, the graspingportion120 may be configured to rotate about thebody portion110 to preventsuture200 entanglement and permit fine control of thetissue approximation clip100. The practitioner may control this rotation using theapplicator400.
• From the firsttissue approximation clip101, thesuture200 passes through theholes141 of the other tissue approximation clips100 such that thesuture200 brings the tissue approximation clips100 together into a multi-tissue approximation clip complex155 (“Multi-TAC”) when thesuture200 is pulled as shown inFIGS. 14I-J, which in turn approximates thetissue defect20. The pass-throughhole141 allows the practitioner to thread thesuture200 through it easily and the path of thesuture200 through the TAC's or Multi-TAC155 can vary. The path of thesuture200 through the tissue approximation clips100 placed about thetissue defect20 may be patterned in a manner that allows purse-string cinching of thesuture200 as shown inFIG. 14F and approximation of the tissue approximation clips100 to form the Multi-TAC155 as shown inFIGS. 14I-J, and thus, approximation of thetissue defect20. Additionally, the path of thesuture200 may be a figure-eight, staggered, zig-zag, or the like.
• To pull thesuture200 in a manner that approximates the tissue approximation clips100 together into a multi-TAC155, a clip approximation means may be deployed. As described in previous embodiments above, the clip approximation means may be either of thecatheter device502 that forms the ball-and-socket complex550 as shown inFIGS. 6A-E and14J, or the suture adjoining clamp601 (“SAC”) as shown inFIGS. 7A-E,8, and14I. The structure of the clip approximation means is the same here as described in previous embodiments. Following the approximation of the tissue approximation clips100 and thetissue defect20, the practitioner cuts thesuture200 via the clip approximation means. If thecatheter device502 is deployed as the clip approximation means, then thecatheter device502 is used to approximate the tissue approximation clips100 (already clipped onto the tissue about the tissue defect20) when thecatheter device502 approaches and is close (or approximate) to the tissue approximation clips100 and thesuture200 is pulled, which is similar to that as shown in FIGS.6B-C. As shown, theball540 is pulled towards thecatheter device502, snaps onto asocket542 such that thesuture200 becomes trapped between theball540 and thesocket542 to form a ball-and-socket complex550 that aids in forming and maintaining the Multi-TAC155 as shown inFIG. 14J. As similarly shown inFIGS. 6D-E, after theball540 is released, aslidable blade520 of thecatheter device502 cuts thesuture200 to release the ball-and-socket complex550. If theSAC601 is deployed as the clip approximation means, theSAC601 approximates the tissue approximation clips100 as theSAC601 approaches and is close, or approximate, to the tissue approximation clips100 and thesuture200 is pulled in a similar manner as shown inFIG. 7A-E or8. Following the approximation of the tissue approximation clips100 into the Multi-TAC155 and the approximation of thetissue defect20, thearms611,612 of theSAC601 approximate together which clamps thegrips614 together to secure thesuture200 to theSAC601. Thesuture200 may be cut using a cutting means, which can be either aslidable sheath620 shown inFIG. 7C or acutting device720 shown inFIG. 8 if the clip approximation means is the SAC601 (the structure of these two different cutting means is the same as described above). Additionally, theSAC601 is then released (or detached) from suture adjoiningclamp applicator410 as similarly shown inFIG. 7D.
• In another alternative embodiment, shown inFIGS. 14A-H, a method for approximating atissue defect20 using a gastrointestinal tissue approximation clip (“GI TAC”) system is provided, the method including the steps described below. A positioning step where the practitioner positions a distal end of aninsertion tube320 of anendoscope300 towards atissue defect20 inside of a patient as shown inFIG. 14A. A directing step where the practitioner directs, via anapplicator400 through aninstrument channel310 of theendoscope300 and towards thetissue defect20, a firsttissue approximation clip101 of a plurality of tissue approximation clips100, the firsttissue approximation clip101 detachably attached to theapplicator400 and coupled to asuture200 as shown. A placing step where the practitioner places the firsttissue approximation clip101 on a first location about thetissue defect20 and clamps the firsttissue approximation clip101 thereon. A detaching step where the practitioner detaches theapplicator400 from the firsttissue approximation clip101 and withdraws theapplicator400 from theinstrument channel310 of theendoscope300. A threading step where the practitioner threads thesuture200 through a pass-throughhole141 of a secondtissue approximation clip102 of the plurality of tissue approximation clips100 as shown inFIG. 14B—if the secondtissue approximation clip102 comes pre-attached with adifferent suture203, then thedifferent suture203 that is unneeded may be cut as shown and thesuture200 can be threaded through the secondtissue approximation clip202 as shown. Another directing step, as shown inFIG. 14C, where the practitioner directs, via theapplicator400, the secondtissue approximation clip102, detachably attached to theapplicator400, through theinstrument channel310 of theendoscope300 and towards thetissue defect20. Another placing step as shown inFIG. 14C, where the practitioner places the secondtissue approximation clip102 on a second location about thetissue defect20 and clamps the secondtissue approximation clip102 thereon. Another detaching step, as shown inFIG. 14D, where the practitioner detaches theapplicator400 from the secondtissue approximation clip102 and withdrawing theapplicator400 from theinstrument channel310 of theendoscope300. The tissue approximation clips100 may still be constructed in this embodiment to be magnetically attracted to each other as described in previous embodiments, which would provide an additional hold. However, the magnetic attraction configuration remains optional for this embodiment.
• For the method in this embodiment, the tissue approximation clips100 include: abody portion110; a graspingportion120 coupled to thebody portion110; and the pass-throughhole141 that is sized for thesuture200. Thesuture200 is directly or indirectly coupled to the first and second tissue approximation clips101,102. It is preferable that thesuture200 is tied or directly coupled to the firsttissue approximation clip101 since thefirst approximation clip101 here serves as the lead tissue approximation clip. As shown inFIG. 14B, thesuture200 passes through the pass-throughhole141 of the secondtissue approximation clip102. As described in the earlier embodiments, thebody portion110 is detachably coupled to theapplicator400 and the graspingportion120 includes first andsecond jaw portions1201,1202 that are constructed to move from a spaced-apart position to an approximated position, or move from the approximated position to the spaced-apart position. The graspingportion120 is configured to grasp onto tissue during the placing steps. Specifically, the graspingportion120 of thetissue approximation clip100 is constructed burrow into the tissue to allow the first andsecond jaws1201,1202 of the graspingportion120 to grasp the tissue and form a tissue mound as shown (the size of the tissue mound is illustrative for purposes of clarity, as the tissue mound is typically larger than what is shown due to the amount of tissue grasped by the tissue approximation clips100). The preferred location of the tissue for the graspingportion120 to grasp onto is about 5 mm to about 10 mm from an edge of thetissue defect20.
• As shown inFIGS. 14D-E, the method further includes additional placing and detaching steps, which repeats the placing and detaching steps described above using additional tissue approximation clips103 from the plurality of tissue approximation clips100 at additional locations of thetissue defect20. As shown, thesuture200 travels from firsttissue approximation clip101 to the secondtissue approximation clip102, and then to the additional tissue approximation clips103. A directing step, as shown inFIGS. 14F-H, where the practitioner directs a clip approximating means (here, theSAC601 as described earlier and shown inFIGS. 7A-B and8) through theinstrument channel310 of theendoscope300 towards the tissue approximation clips100 such the clip approximating means aids in moving the tissue approximation clips100 towards each other such that the tissue approximation clips100 eventually approximate with each other and form a multi-TAC155 in the sequence shown inFIGS. 14H-I from thesuture200 being sufficiently pulled via the clip approximating means, wherein the clip approximation means approaches and is close to, or abuts, the tissue approximation clips100 and thesuture200 passes through the tissue approximation clips102,103 to be received by the clip approximating means as shown. Instead of theSAC601, the clip approximating means may be thecatheter device502 that forms the ball-and-socket complex550 as shown inFIG. 14J and similarly shown in6A-E. Optionally, the tissue approximation clips100 may also be magnetically attracted to each other, as described in earlier embodiments, to further aid in the formation of the multi-TAC155 with the clip approximating means as depicted inFIG. 5. Depending on which clip approximation means is used, the practitioner may use aslidable blade520 if the clip approximating means is thecatheter device520 or, if the clip approximating means is theSAC601, a cutting means (described above) to cut thesuture200 from the tissue approximation clips100 after the practitioner is satisfied that thetissue defect20 is approximated by theMulti-TAC155.
• As shown inFIG. 14F, the path of thesuture200 through the first, second, and additional tissue approximation clips101,102,103 may encircle thetissue defect20 such that when thesuture200 is retracted through the clip approximating means the tissue approximation clips101,102,103 may be drawn towards each other, like cinching a purse string, as thetissue defect20 becomes smaller when thetissue defect20 is being approximated as shown inFIG. 14H. Alternatively, the path of thesuture200 may be a zig-zag as shown inFIG. 14G. Other paths that the practitioner may employ for thesuture200 may include, but are not limited to, figure-eight, staggered, and the like that do not depart from the spirit and scope of the present embodiment.
• Also shown inFIG. 14I, if the clip approximation means is theSAC601, then the SAC610 is constructed to clamp down onto thesuture200 via thearms611,612 and grips614 of the SAC610 and the SAC610 is detached or decoupled from theSAC applicator410 as described above. As shown inFIG. 14J, if the clip approximation means is thecatheter device502, then theball540 is pulled to thecatheter device502 as described similarly above, which causes theball540 to snap onto thesocket542 such that thesuture200 becomes trapped between theball540 and thesocket540 to form a ball-and-socket complex550 that aids in forming and maintaining the multi-TAC155 as shown inFIG. 14J. As similarly shown inFIGS. 6D-E, after theball540 is released, aslidable blade520 of thecatheter device502 cuts thesuture200 to release the ball-and-socket complex550. The simplicity and flexibility of this method and the stability of the hold of thesuture200 provided by the clip approximation means result in the ability to approximate the tissue approximation clips101,102,103 without requiring the tissue approximation clips101,102,103 to be magnetically attracted to each other. The tissue approximation clips101,102,103 may still be constructed in this embodiment to be magnetically attracted to each other as described in previous embodiments to provide an additional hold with each other in theMulti-TAC155, but the magnetic attraction configuration remains optional for this embodiment.
• The construction of the tissue approximation clips101,102,103 used for this method is similar to the constructions disclosed above in earlier embodiments. The first andsecond jaw portions1201,1202 of the graspingportion120 can be a rat-toothed configuration as shown inFIG. 2A. Alternatively, an end of thefirst jaw portion1201 includes aprotrusion1211, and thesecond jaw portion1202 includes ahole1212 to accommodate theprotrusion1211 when thefirst jaw portion1201 in the approximated position with thesecond jaw portion1202 as shown inFIGS. 10A-C. Theprotrusion1211 may be conical, pyramidal, or prismatic. Preferably, theprotrusion1211 is conical. Alternatively, as shown inFIGS. 12A-B, each of the tissue approximation clips100 further includes acorkscrew element1230 that is configured to interact with the tissue (burrow and penetrate) provided that the first andsecond jaw portions1201,1202 of the tissue approximation clips100 are constructed to open, up to about 180° from each other as shown inFIG. 12B.
• Alternatively, as shown inFIGS. 11A-C, the first andsecond jaw portions1201,1202 include a plurality of protrusions that form convex portions of the first andsecond jaw portions1201,1202 respectively. As shown, theprotrusions1221 of thefirst jaw portion1201 are not aligned with respect to theprotrusions1222 of thesecond jaw portion1202 such that theprotrusions1221 of thefirst jaw portion1201 fit inconcave portions1223 of thesecond jaw portion1202, and theprotrusions1222 of thesecond jaw portion1202 fit in theconcave portions1223 of thefirst jaw portion1201—preferably in an interlocking manner when the first andsecond jaw portions1201,1202 close together. If theprotrusions1221,1222 were aligned with each other than they would not interlock with each other when the first andsecond jaw portions1201,1202 are closed together. For the method, the graspingportion120 of the tissue approximation clips100 that are used (first, second, and additional tissue approximation clips101,102,103) may be the rat-toothed configuration as shown inFIG. 2A, theprotrusion1212 andhole1211 configuration as shown inFIGS. 10A-C, the plurality ofprotrusions1221,1222 configuration as shown inFIGS. 11A-C, thecorkscrew element1230 shown inFIGS. 12A-B, any configurations for the graspingportion120 that do not depart from the spirit and scope of the present embodiment, or any configurations that are known in the art.
• Furthermore, the aforementioned different grasping configurations may be combined with each other. For example, the tissue approximation clips100 shown inFIGS. 12A-B, which further includes acorkscrew element1230 configured to interact with the tissue wherein the first andsecond jaw portions1201,1202 of the tissue approximation clips100 are constructed to open up to about 180° from each other, may adopt any of the grasping configurations disclosed above to make the grasping ability of thetissue approximation clip100 more secure and strong. Thetissue approximation clip100 that includes thecorkscrew element1230 may adopt the grasping configuration shown inFIG. 2A wherein the first andsecond jaw portions1201,1202 of the graspingportion120 can be a rat-toothed configuration. Alternatively, thetissue approximation clip100 that includes thecorkscrew element1230 may adopt the grasping configuration shown inFIG. 10A-C wherein an end of thefirst jaw portion1201 includes aprotrusion1211, and thesecond jaw portion1202 includes ahole1212 to accommodate theprotrusion1211 when thefirst jaw portion1201 in the approximated position with thesecond jaw portion1202. Alternatively, thetissue approximation clip100 that includes thecorkscrew element1230 may adopt the grasping configuration shown inFIGS. 11A-C wherein the first andsecond jaw portions1201,1202 include a plurality of protrusions that form convex portions of the first andsecond jaw portions1201,1202. Here, the configuration of the plurality of protrusions has been explained in detail above.
• In this method, the graspingportion120 for eachtissue approximation clip100 may include at least one pass-throughhole141 as shown inFIG. 12A. Alternatively, as shown inFIG. 12B, eachtissue approximation clip100 may further include a suture attach ring140 (“SAR”) that forms the pass-throughhole141. The pass-throughhole141 is sized to permit thesuture200 to pass therethrough. While the shape of thering140 may be round (“O” shaped), the shape of thering140 not limited to adopt this shape in all embodiments. Thering140 may adopt any other shape that is suitable for the purpose of attaching thesuture200 and/or permitting thesuture200 to traverse through. For the tissue approximation clips100 shown inFIGS. 12A-B, the graspingportion120 is constructed to swivel about thebody portion110. Alternatively, as shown inFIG. 12C, eachtissue approximation clip100 may include thering140, which includes a loop portion that forms the pass-throughhole141. Here, thebody portion110 further includes a surroundinggroove112 that is adapted for thering140 to not only sit therein but also rotate about thegroove112 to reduce entanglement of thesuture200 and permit fine control of thetissue approximation clip100. The practitioner controls this rotation using theapplicator400.
• For all of the embodiments that include the tissue closure clips160, the tissue closure clips160 are preferably made from materials which do not have affinity to magnets or have minimal interaction with magnets (e.g. non-ferromagnetic metals like titanium) so as not to interfere with any adjacent tissueapproximation clip complex150 and interfere with clamping process of thetissue approximation clip100. As with other clips and suturing systems, new epithelium grown underneath the tissue approximation clips100 will eventually push the tissue approximation clips100 off such that the tissue approximation clips100 slough off within a few weeks and then excreted through feces.
• For all of the described embodiments, any metals used in the construction of either the tissue approximation clips100 or the tissue closure clips160 should be made magnetic resonance imaging (MRI) safe (or at least MR conditional) as other clips in the market. Implantation of magnets in the body is generally thought not to be MRI safe. However, there are magnetic rings that may be placed laparoscopically at the esophagus/stomach junction that is considered to be “MR Conditional” for MRI systems up to 1.5 T. Approximately 89% of MRI machines in the U.S. are 1.5 T or lower, so the magnetic materials used to construct the magnetic rings may also be used for magnetic parts of the tissue approximation clips100 and tissue closure clips160 (moreover for the former) to ensure that they are MR Conditional for a large majority of MRI systems in the U.S. Moreover, most clips should slough off within a few weeks. Additionally, simple X-rays may be ordered to see if the clips are still adhered to the GI wall. If the clips are still attached and alternative diagnostic procedures cannot be used, then the tissue approximation clips100 and/or tissue closure clips160 can be removed via endoscopy or colonoscopy.
• While the invention has been shown and described with reference to different embodiments thereof, it will be appreciated by those skilled in the art that variations in form, detail, compositions and operation may be made without departing from the spirit and scope of the invention as defined by the accompanying claims.

Claims (20)

What is claimed is:

1. A gastrointestinal tissue approximation clip (“GI TAC”) system for approximating tissue defects, the GI TAC system comprising:

an applicator that is sized to travel through an instrument channel of an endoscope;

a plurality of tissue approximation clips that are transported to a plurality of locations about a tissue defect by the applicator;

a suture coupled to at least one of the tissue approximation clips; and

a clip approximation means for approximating the tissue approximation clips,

wherein the clip approximation means and the tissue approximation clips are sized respectively to travel through the instrument channel, and

wherein the tissue approximation clips are adapted to be detachably coupled to the applicator.

2. The GI TAC system ofclaim 1, wherein each of the tissue approximation clips comprises:

a body portion; and

a grasping portion that is coupled to the body portion; and

a pass-through hole,

wherein the grasping portion includes first and second jaw portions that are constructed to move from a spaced-apart position to an approximated position, and move from the approximated position to the spaced-apart position,

wherein the grasping portion is constructed to grasp a portion of a tissue about the tissue defect, and

wherein the body portion is constructed to be detachably coupled to the applicator.

3. The GI TAC system ofclaim 2, wherein the first and second jaw portions of the grasping portion is of a rat-toothed configuration, or

wherein an end of the first jaw portion includes a protrusion, and the second jaw portion includes a hole to accommodate the protrusion when the first jaw portion in the approximated position with the second jaw portion.

4. The GI TAC system ofclaim 2, wherein the first and second jaw portions include a plurality of protrusions,

wherein the protrusions of the first jaw portion are not aligned with respect to the protrusions of the second jaw portion, and

wherein the protrusions of the first jaw portion interlock with the protrusions of the second jaw portion when the first and second jaw portions are closed together.

5. The GI TAC system ofclaim 2, wherein each of the tissue approximation clips further comprises a corkscrew element that is configured to interact with the tissue, and

wherein the first and second jaw portions of the tissue approximation clips are constructed to open, up to 180° from each other.

6. The GI TAC system ofclaim 2, wherein each of the tissue approximation clips further comprises a ring that forms the pass-through hole.

7. The GI TAC system ofclaim 6, wherein the ring includes a loop portion that forms the pass-through hole,

wherein the body portion includes the ring and a surrounding groove that accepts a portion of the ring therein,

wherein the groove is constructed to keep the ring positioned about the groove,

wherein the ring is rotatable about the groove, and

wherein the suture passes through the holes of the tissue approximation clips such that the suture approximates the tissue approximation clips together, when the suture is pulled, and the tissue defect is approximated.

8. The GI TAC system ofclaim 2, wherein the grasping portion includes at least one of the pass-through hole.

9. The GI TAC system ofclaim 1, wherein the clip approximation means is a catheter device, the catheter device comprising:

a tube which includes an end and a through-hole;

an inner rod that extends from the tube;

a ball detachably coupled to the inner rod;

a socket detachably coupled to the tube; and

a slidable blade to cut the suture,

wherein the end of the tube is open to permit the suture to pass through the opened end of the tube, and

wherein, when the inner rod is retracted into the tube, the ball is constructed to snap onto the socket to trap the suture between the ball and the socket, and the ball detaches from the inner rod and the socket detaches from the tube to form a ball-and-socket complex to approximate the tissue approximation clips.

10. The GI TAC system ofclaim 1, wherein the clip approximation means is a suture adjoining clamp, the suture adjoining clamp comprising movable arms,

wherein each of the arms of the suture adjoining clamp includes a grip and a through-hole through which threading of the suture is permitted, and

wherein the arms of the suture adjoining clamp are movable from a spaced-apart position to an approximated position, and movable from the approximated position to the spaced-apart position.

11. The GI TAC system ofclaim 10, further comprising a suture adjoining clamp applicator that transports the suture adjoining clamp through the instrument channel,

wherein the suture adjoining clamp applicator includes a slidable sheath having a sharpened outer edge,

wherein a width of the slidable sheath is greater than a width of the suture adjoining clamp, and

wherein the outer edge of the slidable sheath is configured to slide across the suture, that is presented by at least one of the through-holes of the arms, to cut the suture.

12. The GI TAC system ofclaim 10, further comprising a cutting device which includes:

a tube having an end; and

a blade to cut the suture,

wherein the cutting device is sized to pass through the instrument channel of the endoscope,

wherein the blade is constructed to slide away from about an edge of the tube end to open the end of the tube,

wherein the blade is constructed to slide towards to at least about the edge of the tube end to cut the suture, and

wherein the end, when opened, creates a through-hole that permits the suture to pass through.

13. A method for approximating a tissue defect using a gastrointestinal tissue approximation clip (“GI TAC”) system, the method comprising the steps of:

positioning a distal end of an insertion tube of an endoscope towards a tissue defect inside of a patient;

directing, via an applicator through an instrument channel of the endoscope and towards the tissue defect, a first tissue approximation clip of a plurality of tissue approximation clips, the first tissue approximation clip detachably attached to the applicator and coupled to a suture;

placing the first tissue approximation clip on a first location about the tissue defect and clamping the first tissue approximation clip thereon;

detaching the applicator from the first tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope;

threading the suture through a pass-through hole of a second tissue approximation clip of the plurality of tissue approximation clips;

directing, via the applicator, the second tissue approximation clip, detachably attached to the applicator, through the instrument channel of the endoscope and towards the tissue defect;

placing the second tissue approximation clip on a second location about the tissue defect and clamping the second tissue approximation clip thereon; and

detaching the applicator from the second tissue approximation clip and withdrawing the applicator from the instrument channel of the endoscope.

14. The method ofclaim 13, wherein each of the tissue approximation clips includes:

a body portion;

a grasping portion coupled to the body portion; and

the pass-through hole that is sized for the suture,

wherein the body portion is detachably coupled to the applicator,

wherein the grasping portion includes first and second jaw portions that are constructed to move from a spaced-apart position to an approximated position, or move from the approximated position to the spaced-apart position, and

wherein the grasping portion is configured to grasp onto tissue during the placing steps.

15. The method ofclaim 14, wherein the first and second jaw portions of the grasping portion is a rat-toothed configuration,

wherein an end of the first jaw portion includes a protrusion, and the second jaw portion includes a hole to accommodate the protrusion when the first jaw portion in the approximated position with the second jaw portion, or

wherein each of the tissue approximation clips further comprises a corkscrew element that is configured to interact with the tissue such that the first second jaw portions of the tissue approximation clips are constructed to open, up to about 180° from each other.

16. The method ofclaim 14, wherein the first and second jaw portions include a plurality of protrusions,

wherein the protrusions of the first jaw portion are not aligned with respect to the protrusions of the second jaw portion, and

wherein the protrusions of the first jaw portion interlock with the protrusions of second jaw portion when the first and second jaw portions are closed together.

17. The method ofclaim 14, wherein each of the tissue approximation clips further comprises a ring that forms the pass-through hole.

18. The method ofclaim 13, further comprising the steps of:

repeating the placing and detaching steps using additional tissue approximation clips from the plurality of tissue approximation clips at additional locations about the tissue defect wherein the suture travels from first tissue approximation clip to the second tissue approximation clip, and then to the additional tissue approximation clips;

directing a clip approximating means towards the tissue approximation clips such that the tissue approximation clips move towards each other to approximate with each other and form a multi-tissue approximation clip complex; and

cutting, using the clip approximation means or a cutting means, the suture from the tissue approximation clips,

wherein the first, second, and additional locations about the tissue defect are approximated to each other following the directing step, and

wherein the clip approximation means and the cutting means are sized to travel through the instrument channel of the endoscope.

19. The method ofclaim 18, wherein the clip approximation means is a catheter device or a suture adjoining clamp,

wherein the catheter device includes a slidable blade and a through-hole which permits threading of the suture therethrough,

wherein the suture adjoining clamp includes movable arms wherein each of the arms of the suture adjoining clamp includes a grip and a through-hole through which permits threading of the suture,

wherein the arms of the suture adjoining clamp are movable from a spaced-apart position to an approximated position, and movable from the approximated position to the spaced-apart position,

wherein the suture adjoining clamp is detachably coupled to the applicator,

wherein, when the catheter device is used in the cutting step, the slidable blade of the catheter device cuts the suture, and

wherein, when the suture adjoining clamp is used in the cutting step, the cutting means for cutting the suture is deployed.

20. The method ofclaim 19, further comprising the step of:

retracting, following the directing step and prior to the cutting step, an inner rod of the catheter device into a tube of the catheter device such that a ball of the catheter device snaps onto a socket of the catheter device to trap the suture between the ball and the socket to form a ball-and-socket complex,

wherein the catheter device further includes:

the tube which includes an end and the through-hole;

the inner rod that extends from the tube;

the socket detachably coupled to the tube; and

the ball detachably coupled to the inner rod,

wherein the end of the tube is open to permit the suture to pass through, and

wherein a path of the suture from the first tissue approximation clip to the second tissue approximation clip and then to the additional approximation clips is substantially a loop, a figure-8, or a zig-zag.

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